Showing structure for (10r,16r,17s)-15-ethenyl-19-oxa-3,13-diazahexacyclo[14.3.1.0²,¹⁰.0⁴,⁹.0¹⁰,¹⁵.0¹²,¹⁷]icosa-2,4,6,8,13-pentaene